[PATCH v1 00/35] Require GNU C --at least GCC 5 or Clang 4-- in headers

[Alejandro Colomar]

Hi Collin,

On Sun, Nov 09, 2025 at 02:15:59PM -0800, Collin Funk wrote:
> Alejandro Colomar <alx@kernel.org> writes:
> 
> > Hi,
> >
> > Probably, not many people (if any) test all those old configurations.
> > That code is likely to have bugs.  Let's remove it, which simplifies
> > a lot of code, and allows us to write better new code.
> >
> > For now, I've raised the minimums to GCC 5 or Clang 4, but we can
> > probably raise it further later.
> >
> > I've successfully tested for regressions on
> >
> > 	$ uname -a
> > 	Linux devuan 6.16.12+deb14+1-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.16.12-2 (2025-10-16) x86_64 GNU/Linux
> 
> Adding Bruno Haible to CC.
> 
> Some of these changes are in files shared with Gnulib, which works
> perfectly fine with GCC 4. We had someone building with GCC 4.1
> recently, so it is still tested [1].
> 
> I would like to avoid dropping old compiler support if possible. Guix
> uses GCC 4 for bootstrapping [2]. If Gnulib drops support for it, I
> assume it will make their lives harder.

Would it be okay to raise the minimum to GCC 4?  That would already
remove many hundreds of lines of code.


Have a lovely night!
Alex

> 
> Collin
> 
> [1] https://lists.gnu.org/r/bug-gnulib/2025-09/msg00128.html
> [2] https://codeberg.org/guix/guix/src/commit/c4fdfa3174d374199c04420fb636a573a02d7834/gnu/packages/bootstrap.scm#L921

-- 
<https://www.alejandro-colomar.es>
Use port 80 (that is, <...:80/>).
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